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http://permalink.gmane.org/gmane.comp.gnu.libtool.patches/11704
https://debbugs.gnu.org/15646
https://bugs.gentoo.org/650876
From: Pavel Raiskup <praiskup <at> redhat.com>
Subject: [PATCH] libtool: handle the -pthread{,s} options for g++
Newsgroups: gmane.comp.gnu.libtool.patches
Date: Thursday 28th November 2013 14:18:05 UTC (over 4 years ago)
As we are forced to pass -nostdlib to g++ for linking, this option
expectedly disables the effectiveness of passed -pthread flag - so
add the -lpthread explicitly to $deplibs to link correctly.
References:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460
https://bugzilla.redhat.com/show_bug.cgi?id=661333
http://lists.gnu.org/archive/html/bug-libtool/2013-01/msg00018.htm
* build-aux/ltmain.in (func_mode_link): Explicitly add -lpthread
flag into $deplibs when -pthread is passed (for g++ only).
--- a/ltmain.sh
+++ b/ltmain.sh
@@ -7127,6 +7127,16 @@
*" $arg "*) ;;
* ) func_append new_inherited_linker_flags " $arg" ;;
esac
+
+ # As we are forced to pass -nostdlib to g++ during linking, the option
+ # -pthread{,s} is not in effect; add the -lpthread to $deplist
+ # explicitly to link correctly.
+ if test "$tagname" = CXX -a x"$with_gcc" = xyes; then
+ case "$arg" in
+ -pthread*) func_append deplibs " -lpthread" ;;
+ esac
+ fi
+
continue
;;
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